Rough rounding machines



3 Sheets-Sheet 1 A. C. KULK ROUGH ROUNDING MACHINES Feb. '26, 1957 Filed Jan. 10

Feb. 26, 1957 A. c. KULIK ROUGH ROUNDING MACHINES Filed Jan. 1Q, 1955 3 Sheets-Sheet 2 eee Feb., 26, 1957 A, C, KULIK 2,782,432

ROUGH ROUNDING MACHINES Filed Jan. l0, 1955. 3 ShetS-Slleei'l 3 ROUGH ROUNDNG MACHINES Alphonse C. Kulilr, Ipswich, Mass., assigner to United Shoe Machinery Corporation, Flemington, N. Il., a corporation of New Jersey Application January 10, 1955, Serial No. 480,842

16 Claims. (Cl. 12--85) This invention relates to rough rounding machines, and is illustrated herein as embodied in a machine of the type disclosed in United States Letters Patent No. 2,697,238, granted December 2l, i954, on my application.

ln my prior machine, a shoe upon which a rough rounding operation is to be performed is positioned relatively to the rounding knife by a crease guide to determine the sole edge extension in the shank portions of the shoe, and a forepart gage is employed for positioning the shoe while its forepart is being operated upon. interchanges ot' the guide and gage between their operative and inoperative positions are effected by operating mechanisms driven by a common operator controlled member, the mechanisms being so constructed as to permit any desired adjustment of' the gage or guide without affecting either the adjustment of the other or the timing with which their interchanges are made. An important objective underlying the design of my prior machine was simplicity of construction compatible with shoemaking requirements which do not necessitate a variable sole edge extension in the forepart of the shoe, Consequently, the operative position of the forepart gage, of my prior machine, upon beinf7 adjusted for the work in hand, remains constant.

As is well known in this art, however, it is often desired, for reasons of style, that the sole edge extension in the forepart be variable. In such a case, the extension is wider in the vicinity of the outer ball line than it is elsewhere around the forepart and diminishes toward the toe of the shoe to a lesser extension of constant Width which extends around the toe to the inner ball line from a point about half-way between the tip line and the ball line at the outer side of the forepart.

ln view of the foregoing, another object of the present invention is to provide an improved sole rounding machine embodying, with the improved structure of my prior machine for effecting interchanges of the forepart gage and crease guide between their operative and inoperative positions, provision for varying the operative position of the forepart gage to produce the above described variable sole edge extension in the forepart, so that all classes and styles of work may be handled in the same machine.

To this end, and in accordance with one feature of the invention, one element of the operating mechanism for the forepart gage, which is mounted for movement in one path under the control of the above-mentioned common operator controlled member to move the gage between its operative and inoperative positions, is mounted for movement in a second path, for varying the operative position of the gage.

The above-mentioned element of the operating mechanism for the forepart gage is moved in its second path by driving means which, in accordance with a further feature of the invention, operates through one cycle for each actuation thereof by the operator, the driving means being constructed and arranged to move the abovementioned element alternately in opposite directions during successive cycles of operation of the driving means nited States Patent O for, as is well understood in this art, right and left shoes are commonly operated upon in succession and the rounding cut which progresses from the toe to the outer ball line on a right shoe, requiring an increasing sole edge extension at this time, progresses from the outer ball line toward the toe on the left shoe, requiring that the forepart gage be moved to diminish the sole edge extension when this portion of the left shoe is operated upon.

While the invention in one aspect is concerned with providing a variable operative position for the forepart gage, as pointed out above, it also contemplates, in another aspect, the controlling of the inoperative position of the crease guide for purposes of insuring the best possible support for the work. In this connection, it is noted that the crease guide not only positions the work relatively to the knife to control the sole edge extension in the shank portions of the shoe but also cooperates with the bottom rest to grip and support the shoe at all times throughout the rounding operation. The crease guide is particularly valuable from the work supporting standpoint at those times when the feed point is backed off from the worli and is going through its return stroke and it is evident that the greater the area ot' the shoe engaged by the crease guide, the better will be its gripping and supporting action upon the shoe. It is, therefore, advantageous to insure that the crease guide, when the forepart gage isin its operative position, be retracted from its operative position no farther than is necessary to avoid obstructing the Work guiding action of the forepart gage.

lu view of the foregoing, a further object or the invention is to provide for the maintenance of the above described relation of the crease guide to the forepart gage when the latter is in its operative position, regardless of any adjustments of the crease guide or the forepart gage which are made for purposes of controlling the sole edge extension. To this end, the operating mechanism for the crease guide in the illustrative machine includes, in accordance with another feature of the invention, in combination with a holder for the crease guide which is adjustable to vary the operative position of the crease guide, a slide carrying the forepart gage and having an adjustable stop which cooperates with an abutment on the holder for limiting the retractive movement of the crease guide when the forepart gage is in its operative position.

From one viewpoint, this construction results in no alteration of the inoperative position of the crease guide with any adjustment of the forepart gage itself because the above-mentioned stop carried by the slide for the r'orepart gage moves with the latter during any adjustment thereof. From another standpoint, it' the adjustment of the crease guide is changed from one for which the above stop has been properly adjusted, the desired relation f the crease guide in its inoperative position to the forepart gage in its operative position `Jvill not be altered because the above-mentioned abutment which cooperates with the stop, being carried by the holder for the crease guide, moves with the latter whenever it is adjusted,

Invention is also to be recognized in the combination, with the above-mentioned stop construction, of yielding connections in the operating means for the crease guide which permit the latter to move, under the control of the stop means, with the forepart gage when its operative position is varied to produce the Baltimore effect. Accordingly, the desired work supporting and guiding function of the crease guide is assured for all operative positions of the forepart gage.

These and other objects and features of the invention will now be described in detail by reference to the drawings and will be defined in the appended claims.

In the drawings,

Fig. l is a side elevation, partly in section, of an illustrative machine embodying the invention;

Fig. 2 is a plan view ofthe structure shown in Fig. l;

Fig. 3 is a sectional elevationl of a part of thev forepart gage operating mechanism;

Fig. 4 is a sectional front elevation of a part of the structure shown in Fig. 3, the section being taken along the line IV-IV in Fig. 3; and

Fig. 5 is a sectional plan view of a part of the driving mechanism for the forepart gage operating mechanism.

A shoe S to be operated upon by the illustrative machine is presented thereto with its bottom seated upon a bottom rest 12' (Fig. l) and the sole edge is rounded by a chopping knife 14 which cuts through the sole against an oscillating feed point 16. The feed point and bottom rest are moved from side to side together to imparty intermittent feeding movements to the work extending from right to left, the feed point having a dwell between its feed and return strokes during which the knife makes a cut through the work against the feed point. The above-mentioned parts, their mounting and their driving mechanism, are the same in the present machine asin that disclosed in United States Letters Patent No. 2,543,760, granted March 6, 1951, upon an application of J. C. Cantley, to which reference may be made for a complete disclosure of this structure.

The shoe is positioned relatively to the knife, to control the sole edge extension, either by a crease guide 18 which is received in the welt crease of the shank portion of the shoe in the usual' manner, or by a forepart gage 20 which engages the margin of the upper adjacent to the welt crease around the forepart. The crease guide and forepart gage, although they are the same individually as the corresponding parts ofV the rounding machine disclosed in United States Letters Patent No. 1,177,021-, granted March 28, 1916, upon an application of T. Corrow, are moved selectively between their operative and inoperative positions by operator controlled mechanism embodying the invention disclosed in my above-mentioned prior application.

With the machine at rest, the crease guide 18 is supported in its normal operative position upon a holder 22 which is mounted to slide vertically in a housing 24 for the driving mechanism for the machine. The crease guide is adjusted vertically, to change it operative position relatively to the knife, by turning a screw 26 which is threaded into the holder 22 and is mounted to rotate freely within a trunnion block 28 without moving axially with respect to the block. This trunnion block is pivotally mounted upon a horizontal arm of a bell crank 30 which is fixed to a shaft 32, the latter being rotatably mounted upon a bracket 34 secured upon the top of the housing 24. The bell crank 30 is operated by toggle links 36, 38 having a common pivotal connection at 40, the former link having a pin 41 at its forward end which is received in a slot 42f in the upper end of a ver'- tical arm of the bell crank 30. The link 38 is pinned to a rock shaft 43. This shaft is mounted to rotate upon the bracket 34 and carries upon its left-hand end a lever 44 upon the forwardl end of which is pivotally mounted a swivel block 46 having a bore for slidingly receiving a treadle rod 48. A freely sliding lost-motion connection is provided between the treadle rod andI the swivel' block by a tube 50 which covers a threaded portion of the rod and is fixed thereon between two pairs of check nuts 52, one for each end of the tube.

The operative position of the crease guide 18 is determined, as well as by the adjustment of the screw 26, by a stop screw 56 which is threaded upon the bracket 3'4 and is` engaged by a lug 58 on the lever 44 and lthe guide is normally biased into this position by a spring 60. This spring is compressed between a swivel block 62, which is` mounted upon an a-rm 64 carried by the shaft 32, and a pair of nuts 66 which are threaded upon a rod 68. The rod passes freelyl through the swivel block 62 and another swivel block 70 and hasrv threaded upon its'` rearward end a pair ofcheckV nuts 72 the forward one of which abuts the swivel block 70 with a pressure derived from the spring 60: The swivel block 70 is mounted upon an arm 74 which is fixed to the shaft 43 and, accordingly, the above-mentioned lug 58 on the lever 44 is normally held against the stop screw 56, the toggle links 36, 38 being in their fully extended relation, or substantially so, for the usual adjustment of the stop screw 56.

With the toggle links 36, 38 in their extended relation and the crease guide in its operative position, the pin 41 engages the upper arm of the lever 30 at the forward end of the slot 42, and the pin and lever are yieldingly held in this relation by the spring 60. However, the pin and slot connection between the toggle link 36 and lever 39 permits a yieldingaction between these parts to occur, even though the toggle links 36, 38 are held in their collapsed position if, as will be more fully pointed out later, the crease guide is lowered in response to movements of the forepart gage by which its operative position is varied.

The operating mechanism for the crease guide having been described, the mounting of and operating mechanism for the forepart gage 20 will next be described.

The forepart gage is pivotally mounted at 76 upon a slide 78 having formed therein a slot 30 which slidably receives an abutment 82 extending between thc arms of a bifurcated projection 84 which is integral with the above-mentioned holder 22. Into the upper forward portion of the slide 78 is threaded a screw 86 which is mounted to rotate freely within a trunnion block 88 but without moving axially with respect thereto. This trunnion block is pivotally mounted on a horizontal arm of a bell crank 90 which swings freely upon a shaft 92 fixed to the bracket 34. To a vertical arm of the bell crankV 90, is pivoted a toggle link 94 which is joined at 96 to another toggle link 98, the latter being pinned to a shaft 100. This shaft is rotatably mounted upon a vertical arm of a bell crank 102 which is mounted to rotate freely upon the above-mentioned shaft 43.

The operating mechanism for the forepart gage includes, with the above structure, other connections between it and the treadle rod 48 comprising an arm 104 which is fixed to the shaft and carries upon its forward end a swivel block 106 through which the treadle rod freely passes. A spring 108 is compressed between the swivel block 106 and check nuts 110 which are threadedupon the treadle rod 48 so as to permit adjustment of the compression inthe spring. Another pair of check nuts 11.2 are threaded upon the treadle rod beneath the swivel block 106 and are normally held against the latter with a pressure depending upon the strength of the spring 108. The timing of the movement of the forepart gage into its operative position may be adjusted by resetting the check nuts 112 upon the treadle rod, the latter normally being biased upwardly into the position shown in Fig. 1 which is determined by a stop (not shown).

When it is desired to guide the shoe by use of the forepart gage 2.0, the operator lowers the treadle rod 48 which, through the spring 108 and the swivel block 106, swings the arm 104 downwardly until a projection 114, integral with the toggle link 98, engages a shoulder on the toggle link 94, at which time the toggle links are in their fully extended relation and the forepart gage 20 will have been moved into its operative position. At about the same time, depending upon the adjustment of the check nuts 52 on the treadle rod 4S, the lower nut of the upper pair engages the swivel block 46, and with continued downward movement of the treadle rod, permitted by yielding action of the spring 108 and lost motion between the treadle rod and the swivel block 106, the above described operating mechanism for the crease guide is operated to collapse the toggle links 36, 33 whereby the holder 22 isA raised, and the crease guide 18 is lifted above the bottom of the welt crease so asY not to interfere with the guiding action of the shoe now provided by the forepart gage.

The crease guide continues to cooperate with the bottom rest to grip and support the shoe, as the guide is moved upwardly only as far as necessary to permit the forepart gage to take over the guidance of the shoe, the inoperative position of the crease guide being determined by the engagement of the abutment 82 on the holder 22 with a stop 116 which is mounted for Vertical adjustment within the slot 80 in the slide 78. A screw 118 having a knob 120 fixed to its upper end is rotatably mounted in the slide 78 and is threaded into the stop 116 for purposes of adjusting the latter. It will now be evident that regardless of how the forepart gage may be adjusted, by turning the screw 86, no change will be made in the inoperative position of the crease guide relatively to the forepart gage, with the result that the minimum retractive movement of the crease guide out of its operative position will be preserved regardless of any change in the setting of the forepart gage. Similarly, with any adjustment of the operative position of the crease guide 18, the above-mentioned relation between the crease guide and forepart gage 20, when the latter is in its operative position, will not be disturbed because the abutment 82 is subject to whatever adjusting movement is imparted to the crease guide.

If, when the treadle rod 48 is lowered, the stop 116 is engaged by the abutment 82 before the treadle rod reaches the bottom of its normal stroke, it is evident that the stop 116 would become a stop for also limiting the downward movement of the treadle rod. In order to prevent this from occurring, the stop 116 being too light for this purpose, rearward yielding movement of the pin in the slot 42 takes place after the abutment 82 has engaged the stop 116 and while the treadle rod 48 is further lowered to the bottom of its stroke.

Any desired timing in the interchange of the crease guide 18 and forepart gage 20 can be eifected by adjusting the stop screw 56 and the check nuts 52, 112, as has been fully described in my prior patent, to which reference may be made for a complete recital of the various adjustments of these parts which are commonly used for various types of work.

There will next be described driving mechanism, cooperating with the above described operator controlled operating mechanism for the forepart gage, for varying the position of the forepart gage while it is in its operative position in order to produce a variable sole edge extension at the outer side of the shoe. As is well understood in this art, this increased extension, or so-called Baltimore efect, is made by lowering the gage as the rounding cut approaches the outer ball line of a right shoe and by raising the gage, from the last operating position it had when a right shoe was being operated upon, as the rounding cut upon a left shoe departs from the outer ball line.

Such movements are imparted to the forepart gage 20 in t'ne illustrative machine by power operated mechanism which is arranged to move the bell crank 102 alternately in opposite directions during successive cycles of operation of the power operated means. `More speciically, after the lever 104 and shaft 100 have been moved by the operator to swing each of the toggle links 04, 98 in a path extending crosswise thereof into their extended relation whereby the forepart gage is moved into its operative position, the toggle links are automatically moved bodily lengthwise thereof in another path extending transversely of the above-mentioned path, white being held in their extended relation, in one` direction or the other as appropriate to raise or lower the operative position of the forepart gage.

This motion of the bell crank 102 is derived from a cam 122 (Figs. 2 and3) which is fixed upon a shaft 124, the latter being rotatably mounted upon a bracket 126 6 which is fixed to the top of the housing 24. This cam has rising and falling slopes, each of 170, these slopes being separated by concentric portions of the cam of 10 and during each cycle of operation of driving mechanism for the cam, as will be more fully described later, the cam is rotated through a half revolution to present one or the other of these slopes to a cam follower roll 128. The roll 128 is mounted upon a lever 130 fulcrumed at 132 upon the bracket 126 and having a horizontal arm 134 which is disposed in overlapping relation to a similar horizontal arm 136 of the lever 102. The roll 128 is biased continually into engagement with the cam 122 by a spring 138 which is stretched between the upper ends of the levers 102, 130. In order to vary the range of movement of the forepart gage using the same cam 122, provision has been made for varying the movement imparted to the lever 102 by the lever arm 134 which has a constant stroke. To this end, a link 140 (Figs. 3 and 4), carrying swivel blocks 142 which are slidably received within slots extending lengthwise of the lever arms 134, 136, is mounted for adjustment toward and away from the fulcrum 132 so as simultaneously to eect, with an increase or decrease in the eiective length of the arm 134, a corresponding decrease or increase, respectively, in the length of the arm 136. The link 140 is mounted to slide vertically in a grooved guide block 144 which is mounted for adjustment lengthwise of the arms 134, 136 along a horizontal slot 146 formed in the bracket 126. A knob 148 threaded upon a stud 150 to which the block 144 is secured is provided for clamping the block 144 in any desired position on the bracket.

The cam 122 is rotated, through a half revolution at a time, by connections including a drive shaft 152 (Figs. l and 2) which is rotatably mounted upon the bracket 126 and carries upon its forward end a spiral gear 154 which meshes with another spiral gear 156, the latter being xed upon the left-hand end of the shaft 124. A clutch collar 158 is spline-d to the shaft 152 and is movable axially thereof into engagement with either a braking shoulder 160 formed upon the bracket 126 or a sprocket 162 which is rotatably mounted upon the shaft 152. This sprocket is connected by a chain 164 with another sprocket 166 mounted upon the output shaft of a reduction gear unit 168, the input shaft of which carries a stepped pulley 170. A belt 172 connects this pulley with a motor pulley 174 and is kept taut by an idler pulley 176 which is mounted upon the housing 24 by means of an adjustable bracket 178. With the belt 172 running upon the intermediate step of the pulley 170, the cam 122 is rotated through a half revolution while a normal feeding movement of the work of about 1%" takes place. It has been found that the Baltimore eifect can satisfactorily be confined to this distance for shoes of all sizes and styles. However, if the operator, by his handling of the shoe, unduly increases or diminishes the feeding movement during a cycle of operation of the cam 122, a compensating change in the speed of the cam may be effected by shifting the belt 172 to the smallest or largest step of the pulley 170, respectively.

The drive shaft 152 is normally stationary, the clutch collar 158 being held in engagement with the braking shoulder 160 by a clutch lever 180 which is mounted to swing upon an arm 182 fixed to the bracket 126 and carries a pair of rolls 184 which are received in a groove 186 in the clutch collar 158. Upon a rod 188 (Figs. l and 5) extending between the lower ends of the lever 180 is rotatably mounted a U-shaped link 190 carrying a swinging bell crank 192 having a horizontal arm which supports a spring 194. This spring urges a pawl 196 and a vertical arm of the bell crank 192 into engagement with a block 198 which is fixed upon the lower arm of a lever 200, the latter being pivotally mounted at 202 upon the bracket 126. The pawl 196 at its rear end has an elongated slot which receives the rod 188, upon which the pawl freely swings and may slide'a limitedA amount. A roll 204 carriedby the upper arm of the lever 200 runs upon a' control cam 206 which has two lobes uponits periphery and is fixed to the shaft 124. The roll 204 is continually biased into engagement with the cam 206 by a spring; 208 which is coiled about a rod 209 and abuts the lower arm of the level 200. The forward end of the rod 209 is threaded into a stop 210 which is mounted to swivel upon the bracket 126. A shoulder on the rod 209, behind the stop 210, is engaged by the forward end of the spring- 208, the tension of which can be varied by turning the rod 209.

With the above described parts of the machine in the positions they occupy between' cycles of operation of the driving mechanism for the cam 122, as illustrated in Fig. l, the roll 204y rests upon the leading end of a lobe on the cam 206, causing the block 198 to be held in its forward position. The block is engaged by the upper arm ofthe bell crank 192 with a pressure corresponding to the force exerted by the spring 194 upon thev lower arm of the bell crank 192l and the pawl 196. By this force, derived from the spring; 194, the clutch collar 158 is normally heldin yielding, engagement with the braking. shoulder 160 with a relatively light pressure transmitted from the spring 194 through the bell crank 192, the link 190, the rod 188 and the lever 180.

At this time also, the forward portion of the pawl 196 is hooked over the lower end of the block 198 and the pawl is held, against the force of a spring 212 stretched'. between the bracket 126 and the rear end of theI pawl, in such a position that a small clearance exists between the forward side of the rod 188 and the pawl. Thus, the spring 212 has no effect upon the braking pressure supplied by the spring 194.

A -cycle of operation of the driving mechanism for the cam 122 is initiated by operating a knee pad (not shown) at the front of the machine which causes a rod 214, beside the above-mentioned rod 48, to be lowered. Through a bell crank 216 operated by the rod 214 and pivotally mounted upon the housing 24, a link 218, connected to the bell crank, is pulled forwardly. This link is connected to and swings clockwise a bell crank 220 which is pivoted upon the housing 24 and is connected by a link 222 to the forward end of the link 190. When the knee pad is operated, the bell crank 192 is lowered by the link 190, and a shoulder 224 on the vertical arm of the hell crank which overlies the end of the. pawl 196 moves the latter out of engagement with the. block 198, whereby the pawl is freed for rearward movement under the impulse of the Spring 212. The pawl, acting upon the rod 188, now imparts rearward movement to the lever 180, causing the clutch collar 158 to be, shifted into driving engagement with the sprocket 162. Thus, a cycle of operation of the drive mechanism for the cam 1122: is initiated and a raising or lowering movement, depending upon which slope of the cam is presented to the roll 128, is imparted to the forepart gage 20.

Shortly after the rotation of the cam 122 begins, the rearward lobe on the cam- 206 is carried out of engagement with the roll 204 and the block 198 swings rearwardly under the impulse of the spring 288 into such a position that the hooked end of the pawl 196 is again reset over the end of the block 198. Toward the end of a half revolution of the cam 122, the roll 204 is engaged by the leading end of the other lobe on the cam 206 causingthe block 198 to be swung forwardly. It rst pulls the pawl 196 forwardly, away from the forward side of the rod 188, relieving the pressure between the clutch collar S- land sprocket 162, and then acts upon the bell crank 192 to move the, link 190 forwardly, whereby the clutch collar 158 is separated' from the sprocket 162i and brought into engagement with the braking shoulder 160. Thus, rotation of the shaft 152v is stopped immediately when the abruptly rising slope ou a lobe of the cam 206 is presented totheroll 204. It is noted that the resetting of the pawl 196 against the block 198 occurs regardless of whether the link is held down by continued application of pressureto the knee pad by the operator and, therefore, that the cam 122 will always be automatically stopped at the end of each half revolution.

The sprocket 162 can be adjusted axially of the shaft 152, to compensate for Wear of the clutch collar 158, by turning a nut 226 which is threaded upon the rear end of the shaft 152. This nut bears against the inner race of a ball bearing 228, for supporting the rear end of the shaft 152, which is free to slide; with any adjustment of the nut 226, within a strut 230 which is iixed to the bracket 126. The bearing 228 abuts a collar 232 which is engaged by the rear, one of a pair of ball bearings 234 by which the sprocket 162 is rotatably mounted upon the shaft 152. A spring 236, which is compressed between a shoulderl on the shaft 152 and the forward bearing 234, biases the above-mentioned bearing assembly rearwardly as far as the setting of the nut 226 permits.

The operation of the machinewill now be summarized, rst with reference to a rounding operation performed upon a right shoe. The rounding cut is begun at the inner heel breast line and is carried along the shank under the control of the crease guide which is in its op erative position, as illustrated in Fig. 1. As the rounding cut approaches the inner ball line, the treadle rod 48 is lowered to bring the forepart gage 20 into operative position and to move the crease guide into its inoperative position. It is. to be understood that this movement of the crease guide is insufficient to remove it from the upper surface of the welt but great enough to avoid interference with the guiding action of the forepart gage, this retractive movement of the crease guide into its inoperative position being adjustably limited by the engagement of the abutment 82 with the stop 116. The rounding cut, under the control of the forepart gage 20, is now transferred along the inner side of the forepart of the shoe, around the toe, and then along the outside of the forepart with the shoe held in a constant relation to the knife so as to produce a uniform sole edge extension However, when a point at the outer side of the shoe at a distance of about 1% from the outer ball line is reached, the operator presses upon the knee pad for lowering the rod- 214, thereby initiating a cycle of operation of the driving mechanism for the cam 122. Thereupon, the forepart gage is gradually lowered from its uppermost operative position (as the rising slope on th camv 122 is presented to the roll 128) and, at the completion of this half revolution of the cam 122, the forepart gage will have been moved into its lowermost operative position at the time when the rounding cut passes the outer ball line. With this lowering movement of the forepart gage there occurs a similar movement of the same extent of the crease guide under the controlof the stop 116, this movement of the crease guide being permitted by lost motion between the lever 30 and the pin 41. The operator now releases the treadle for operating the rod 48, permitting the forepart gage 20 to rise out of engagement with the shoe into its inoperative position and causing the crease guide to be returned to its operative position. The rounding cut upon the shoe, which now is under the control of the crease guide, is continuedv along the outer shank and is terminated at the heel breast line.

In rounding a left shoe the rounding cut is begun at the outer heel breast line and is carried, under the guidance of the crease guide to the vicinity of the outer ball line. Here, the operator again lowers the treadle rod 48 to bring the forepart gage 20 into its lowermost operative position (that to which it was brought by the previous operation of the cam 122.) and to return the crease guide 18 to its inoperative position. Immediately upon, or soon after moving the forepart gage into its lowermost operative position the operator presses uponthe knee pad to initiate another half revolution of the cam 122, which results in the forepart gage being elevated gradually to its uppermost operative position and the production of a diminishing sole edge extension on the shoe as the rounding cut is carried away from the outer ball line. With such rising movement of the forepart gage the crease guide has a similar rising movement of the same extent controlled by the stop 116 and derived from the biasing effect of the spring 60. During this rising movement of the crease guide the lever 30 is swung relatively to the pin 41 between which and the slot 42 there is finally reestablished the original relation which existed before the forepart gage was lowered from its uppermost operative position. The retractive movement of the forepart gage is automatically terminated, at the end of this half revolution of the cam 122, at a point about 1%" from the outer ball line and, thereafter, the rounding cut produces an invariable sole edge extension around the toe and inner side of the forepart up to the inner ball line. Here, the operator again releases the treadle for operating the treadle rod 48, causing the crease guide 18 again to resume control of the shoe while the rounding cut is carried along the inner shank to the inner breast line and the forepart gage to return to its inoperative position.

It is noted that when the forepart gage is next returned to its operative position it will already be in its uppermost operative position, as is appropriate for guiding the next shoe to be operated upon which will be a left shoe.

Any desired range of movement of the forepart gage 20 between its lower and upper operative positions, up to can be obtained by adjusting the slideway 144 along the slot 146 so as to vary the eective lengths of the arms 134, 136.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a sole rounding machine having a rounding knife and a gage movable from an inoperative position into an operative position for positioning a shoe relatively to the knife, gage operating mechanism comprising an operator controlled member mounted for movement in one path to move said gage into and out of its operative position, and power operated means acting upon said member to move it lengthwise thereof in another path while said gage is in its operative position to vary the operative position of said gage.

2. ln a sole rounding machine having a rounding knife and a gage movable from an inoperative position into an operative position, gage operating mechanism comprising an operator controlled member mounted for movement crosswise thereof in one path to move said gage into its operative position, said member being movable lengthwise thereof in a second path to vary the operative position of said gage, and power operated means for moving said member in its said second path alternately in opposite directions during successive cycles of operation of said power operated means to vary the operative position of said gage.

3. In a sole rounding machine having a rounding knife and a gage movable from an inoperative position into an operative position for positioning a shoe relatively to said knife, gage operating mechanism comprising a member mounted for movement in mutually transverse paths and operator controlled means for moving said member in one of its paths to transfer said gage between its said positions, and driving means acting upon said member to move it in another path alternately in opposite directions during successive cycles of operation of said driving means whereby the operative position of said gage is varied.

4. In a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to said knife, gage operating mechanism comprising a member mounted for movement in different paths directed transversely of each other, said mechanism also comprising an operator controlled element for moving said member in one path to transfer said gage between inoperative and operative positions, cam operated mechanism for moving said element in a second path to vary the operative position of said gage, and means for driving said cam operated mechanism through one cycle of operation at a time, said cam operated mechanism being constructed and arranged to move said element and gage alternately in opposite directions during successive cycles of operation of said cam operated mechanism.

5. ln a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to said knife, gage operating mechanism comprising a lever mounted to swing upon a second lever, operator controlled means including said first-mentioned lever for transferring said gage between inoperative and operative positions, and power operated means for swinging said second lever alternately in opposite directions during successive cycles of operation of said power operated means whereby the operative position of said gage is varied, and operator controlled means for initiating a cycle of operation of said driving means.

6. In a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to said knife, operator controlled mechanism for moving said gage between an inoperative and an operative position, said mechanism comprising a lever mounted to swing upon a movable fulcrum, a cam, driving means for rotating said cam through successive cycles in the same direction, and connections operated by said cam for moving said fulcrum lengthwise of said lever alternately in opposite directions whereby the operative position of said gage is varied.

7. In a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to the knife, operator controlled means including a toggle for moving said gage into and out of operative position, a support for said toggle movable to vary the operative position of said gage, and driving means for moving said support in successive cycles of operation of said driving means alternately in opposite directions.

8. In a sole rounding machine having a rounding lmife and a gage for positioning a shoe relatively to the knife, gage operating mechanism comprising a toggle movable between a collapsed relation and an extended relation to cause said gage to be moved between an inoperative position and an operative position, respectively, operator controlled means for moving said toggle between its collapsed and extended relations, and power operated means for bodily moving said toggle while in its extended relation a predetermined amount during each cycle of operation of said power operated means to vary the operative position of said gage.

9. In a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to said knife, gage operating mechanism comprising members mounted for movement relatively to each other crosswise thereof to cause said gage to be moved between an inoperative and an operative position, said members also being mounted for movement bodily lengthwise thereof, operator rcontrolled means for moving said members with respect to each other, and power operated means for bodily moving said members lengthwise thereof when said gage is in its operative position to vary the operative position of said gage.

l0. In a sole rounding machine having a rounding knife and a gage for positioning a shoe relatively to the knife, operator controlled mechanism for moving said gage into and out of its operative position, said mechanism cornprising a support which is movable to vary the operative position of said gage, and driving means for moving said support, said driving means including a cam and adjustable connections between said cam and said support for varying the eifective throw of said cam whereby the range of operative positions of said gage is varied.

ll. In a sole rounding machine having a rounding knife and` a. gage for positioning a shoe relatively to said knife, gage operating mechanism for moving said gage into and out of its operative position, said mechanism comprising a support which is movable to vary the operative position of said gage, driving means for moving said support comprising a cam, a pair of'levers between said cam and said support, and a member connecting said levers, said. member being mounted for adjustment topvary the effective length of. said levers whereby the amplitude of movement of said support and the operative position of said gageare varied.

l2. In a sole rounding` machine having a rounding knife and a gage for positioning a shoe relatively to. said knife, gage operating mechanism for moving said gage from an inoperative position into an operative position,A and mechanism for varying` the-operative position of said gage comprising a lever with one arm of which said gagev operating mechanism is associated, a cam, a second lever one arm of which is operated by said cam, each of said levers having a second arm, `said second arms being disposed in` overlapping relation, a slide connecting said second arms, and a guide on which said slide is mounted for movement transversely of said second arms, said guide being mounted for adjustment lengthwise of said second arms to vary their effective length and the amplitude of movement of said gage.

13. In a sole rounding machine having a crease guide and a forepart gage each being mounted for movement between inoperative and operative positions, an adjustable holder for said crease guide, a slide carrying said forepart gage, an abutment on said holder for slidably supporting said slide, and a stop mounted for adjustment upon said slide for limiting, by engagement with said abutment, movement of said crease guide into its inoperative position when said gage is in its operative position.

14. A sole rounding machine having a rounding knife, a crease guide, a forepart gage, operator controlled operating mechanisms for moving said guide and gage oppositely to each other into and out of their operative positions alternately, said crease guide operating mechanism comprising a holder for said crease guide and extensible connections for adjusting said holder to vary the position of said guide relatively to the knife, said fore-l part: gage operating means comprising a slide upon which said gage is mounted and extensible connections for positioning said slide so as to vary the operative position of said gage relatively to said knife, an abutment carried by said holder upon which said slide is slidably mounted',v and a stop adjustably mounted upon said slide for limiting movement of said crease guide out of its operative position by engagement with said abutment.

l5. In a sole rounding machine having a reciprocatory rounding knife, a crease guide and a forepart gage for positioning a shoeto` be rounded relatively to said knife, operating mechanisms for moving said guide and gage oppositely to each other into and out of their operative positions alternately, said crease guide operating mechanism comprising a holder for said guide and means for adjusting said holder toward and away from the path of said knife thereby to. vary the operative position of said guide, saidforepart gagev operating mechanism comprising a slide upon which said gage is mounted,r said holder having, an abutment upon which said slide is mounted for movement to carry said gage between its operative and inoperative positions, and a stop adjustably mountedV upon said slide and cooperating with said abutment to limit movement of said guide out of its operative position when said' gage-is in its operative position.

16. A sole rounding machine having a rounding knife, a crease guide. and a forepart gage for positioning a slioe to be roundedy relatively to said knife, an operating mechanism for each of said guide and gage for moving them, oppositely tov each other between their inoperative. and operative positions, stop means associated with said guide and gage for determining the inoperative position of said guide when said gage is in its operative position, driving` means acting upon said forepart gage operating l mechanism to vary the operative position of said gage,

said crease guide operating mechanism including yielding connections for permitting said crease guide to move with saidl forepart gage in response to'changes in its operative position effected by said driving means.

References Cited in the tile of this patent UNITED STATES PATENTS 1,425,558 Valois Aug. l5, 1922 

